Jeroboam probably confiscated the Levitical lands for the benefit of this new priesthood. Under these circumstances the priests and Levites emigrated in large numbers to the southern kingdom; an act which was followed by a general emigration of the more pious Israelites 2 Chronicles 11:16.

The Levites left their suburbs - They and the priests were expelled from their offices by Jeroboam, lest they should turn the hearts of the people to the true God, and then they would revolt to Judah, 1 Kings 12:26; and therefore he established a new worship, and made new gods.

For the Levites left their suburbs and their possession,.... The cities and the fields adjacent to them, which were given them in the several tribes, and were in all forty eight; see Joshua 21:1 and came to Judah and Jerusalem; to the cities of Judah, which belonged to the Levites; and to Jerusalem, where they exercised their functions:

for Jeroboam and his sons had cast them off from exercising the priest's office unto the Lord; neither suffering them to go to Jerusalem in their courses, as they used to do by turns, nor to perform their office in their own dwellings, according to the law of God, in teaching and instructing the people.

For the Levites left their suburbs and their possession, and came to Judah and Jerusalem: for Jeroboam and his sons had cast them off from executing the priest's office unto the LORD:

11:14 Cast them off - They would not suffer them to instruct the Israelites in the worship of God, nor to go up to Jerusalem to worship in their courses: and these priests would not join with them in the worship of the calves, as they were commanded to do; and therefore they, willingly forsook all their patrimonies and possessions for God's sake. No secular advantages whatsoever should detain us there, where we are in danger of making shipwreck of faith and a good conscience.

11:13-23 When the priests and Levites came to Jerusalem, the devout, pious Israelites followed them. Such as set their hearts to seek the Lord God of Israel, left the inheritance of their fathers, and went to Jerusalem, that they might have free access to the altar of God, and be out of the temptation to worship the calves. That is best for us, which is best for our souls; in all our choices, religious advantages must be sought before all outward conveniences. Where God's faithful priests are, his faithful people should be. And when it has been proved that we are willing to renounce our worldly interests, so far as we are called to do so for the sake of Christ and his gospel, we have good evidence that we are truly his disciples. And it is the interest of a nation to protect religion and religious people.